Sample 8
NavDat sample number 4638 · RHYODACITE
Sample
| Sample ID | 8 |
|---|---|
| Rock name | RHYODACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | phenocrysts of plagioclase, hornblende, and biotite in cryptofelsite groundmass traversed by abundant microliths of oligoclase |
Location
| Latitude | 39.2458 |
|---|---|
| Longitude | -121.731 |
| Location | NE edge of the buttes |
| State / province | California |
| Volcanic field | Sutter Buttes |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 1.75 | 1.5 | 2 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 63.62 | WT% | XRF | |
| TIO2 | 0.08 | WT% | XRF | |
| AL2O3 | 16.94 | WT% | XRF | |
| FEO | 1.83 | WT% | XRF | |
| FE2O3 | 1.87 | WT% | XRF | |
| MNO | 0.07 | WT% | XRF | |
| CAO | 4.62 | WT% | XRF | |
| MGO | 2.88 | WT% | XRF | |
| NA2O | 4.06 | WT% | XRF | |
| K2O | 2.33 | WT% | XRF | |
| P2O5 | 0.27 | WT% | XRF | |
| H2O_MINUS | 0.36 | WT% | XRF | |
| H2O_PLUS | 1.2 | WT% | XRF | |
| TOTAL | 100.13 | WT% | XRF | |
| NB | 5 | PPM | XRF | |
| ZR | 130 | PPM | XRF | |
| Y | 25 | PPM | XRF | |
| SR | 835 | PPM | XRF | |
| RB | 120 | PPM | XRF | |
| TH | -5 | PPM | XRF | |
| PB | 20 | PPM | XRF | |
| GA | 20 | PPM | XRF | |
| ZN | 60 | PPM | XRF | |
| CU | 20 | PPM | XRF | |
| NI | 45 | PPM | XRF | |
| V | 65 | PPM | XRF | |
| CR | 120 | PPM | XRF | |
| BA | 1680 | PPM | XRF | |
| CE | 45 | PPM | XRF | |
| ND | 20 | PPM | XRF | |
| PR | 5 | PPM | XRF | |
| LA | 25 | PPM | XRF | |
| CL | 60 | PPM | XRF | |
| S | 70 | PPM | XRF |